Engine swap Prado 1996

Hey guys . Finally decided to change the engine of my prado . Running the stock 1kz . I want some serious increase in speed and for that i want to change the engine . Give me some suggestions and also highlight the prices of the engines aswell . Diesel or Petrol . I was also thinking about 04 land cruiser,s engine . Not interested in 4x4 , just need road performance .